Map finder



April 22, 1930.

5MM @MM Patented Apr. 22, 1930 FRIEDRICH MA'I'lENKLOT'l",v OF BERLIN, GERMANY I MAP FINDER Application med June 14, 1927, serial No.

This invention relates to a device for quickly and conveniently finding particular means of a finder which is either associated loosely with the plan or map or is secured to the folder enclosing the same in such a manner that said finder may be moved horizontally or vertically over the map or plan.

To enable the finder to be moved with certainty over the map or plan the latter is subdivided into separate sections or strips which are indicated thereon either by printed linesor by the folding or by means of a guide line along which the finder is moved. If guide lines are employed, these are preferably so arranged that they correspond to the centre line of the finder. So that separate portions of the map or plan may be investigated by means of the finder without it being necessary to spread out the plan or map to its full extent, the latter is folded in a zigzag fashion both transversely and vertically. Any sub-division of the plan may then be brought within the reach of the finder by simple folding and unfolding of the zig-zag folds. Where the finder is not associated with the map as a separate member it is mounted so as to be capable of horizontal movement on the folder of the map by means of suitable connecting elements7 such as cord, strip-s or the like, or, which is preferable, on the front edge of a street or place directory secured to the cover or to the preceding text. The directory will contain appropriate references for use with the map and explanatory notices. It may, however, be amplified or replaced as desired by advertisements or by imprinted paper strips.

In many cases it is desirable to be able to survey at a time a larger surface of the 198,783, and in uGermany October 28, 1926.

plan or map than that corresponding to a single section. For this purpose the finder may be extended on both sides by expanding it to one or more times its original length. These auxiliary finders, made effective by extension7 are limited as to their extension in such a manner that when fully extended they form an extension of the main finder scale. i

One embodiment of the invention is illustrated by way of example in the accompany- 'ing drawing in which the case of an extensible finder associated with a directory and plan is illustrated.

VReferring to the drawing a indicates a "folderor the like inside which a map b, for

example a plan of a town, is secured. The plan is so folded as to allow of definite sections of plan only, having the width of the finder, being unfolded at a time for inspection.` Said sections of the plan may be furnished with guide lines to enable the finder to be-guided over the plan with certainty. These guide lines I, 'II are preferably Varranged on the separate plan-sections in such a manner as to coincide with the middle lines of each of said sections; due to this provision the finder may be positioned correctly on the plan simply by laying the centre line of the finder, vpreferably having a'thicker or 80 otherwise distinguished scale mark, on ythe guide line. The upper and lower edges of the plan are provided with a scale c indicating the vertical co-ordinates. The investigation in the horizontal direction is effected by means of the finder Z which is fixed to the edge of the directory e secured in turn to the inside of the cover of the folder. The directory is folded in a zig-zag manner and has a length at least equal to the width of the plan.

In order to enable one to examine with the nder d more than one section of the plan at a time said finder is provided with an ex-` tensible scale 7 and g which permits to cover 95 several (for example as illustrated, two) sections of the plan. The two strips of which the slide f is composed are limited in respect of their longitudinal extension in such a manner that in the fully drawn out position said strips,

their scale forms a direct continuation of that of the main portion d of the finder.

The various modifications set forth above should be clear after the explanation and do not require separate detailed description.

The device is employed in the following manner A,.particulai"point, say P, isfor example looked up in the directory e and the reference II 10h is found therein. The plan or map is then folded so thatfthe guide" line Il'lies under the scale mark Z of the finder d. The finder is next moved along the line Hunt'il'it comes above the scale value 10 ofthe scale c.

The sought point must now lie immediately '..oppositethescale mark h ofzthe finder.

Fromi this example the advantage of the fin'der'extensions f, g is also-clear. v Referring to the case illustrated it will be-seen that it -is sufficient tofold the plan in the manner .shown'in the drawing. rIhe scale vmark hof the fully extended-auxiliarynder f Will then indicatev the sought ypoint- P.

Instead of being glued or otherwise secured .tothe-edge of thestreet directoryZ e thefinder may-alsogbe held in the -folder by means of bandsior stripsWhich-allow of it being-moved across the plan. "Where plansor mapsare to be mounted on the Wall, the finder is preferably furnished yas aseparate member. In contradistinction to knowndevces vit isan imkvportant'advantage that the` use of the pres- ,-ent

device is .not attended by vtdamage tothe .mapor rplan.

I claim:

lnln locating means for Emapsfthe combi .nation ofaffmap provided vvvithordinates at '.i-ts margin in one direction and foldable in Z-ig-,Zagfmanner in the other direction to form :ap-plurality ofl strips, a guide line on-each of .a scaled finder of... a-flength equal .totheividth of saidfstripsj. said finder being fastenedto. the edgeofaidirectory so as to be `movable in. said onesdirection over said strips Iandfpro'vided With fa distinguishing scale 4,mark adapted to be brought in. alignment ywith said vguide line. K

.2. Locating means forma-ps, as specified-by claim 1, in` which the finder is' extensiblev in Vsaid other directionito permit surveying of said map over more ythan one of said strips. ,In testimony whereofl afix -my signature.

FRIEDRICH MTTENKLOTT. 

